feat(Swift6.0): Introduce Sendable APIs

Package.swift

@@ -3,26 +3,35 @@
 import PackageDescription
 
 let package = Package(
-  name: "swift-capture",
-  products: [
-    .library(
-      name: "Capture",
-      targets: ["Capture"]
-    )
-  ],
-  dependencies: [
-    .package(
-      url: "https://github.com/apple/swift-docc-plugin.git",
-      from: "1.3.0"
-    ),
-  ],
-  targets: [
-    .target(name: "Capture"),
-    .testTarget(
-      name: "CaptureTests",
-      dependencies: [
-        .target(name: "Capture")
-      ]
-    ),
-  ]
+	name: "swift-capture",
+	products: [
+		.library(
+			name: "Capture",
+			targets: ["Capture"]
+		)
+	],
+	dependencies: [
+		.package(
+			url: "https://github.com/apple/swift-docc-plugin.git",
+			from: "1.4.0"
+		),
+	],
+	targets: [
+		.target(name: "Capture"),
+		.testTarget(
+			name: "CaptureTests",
+			dependencies: [
+				.target(name: "Capture")
+			]
+		),
+	]
 )
+
+#if compiler(>=6)
+for target in package.targets where target.type != .system && target.type != .test {
+	target.swiftSettings = target.swiftSettings ?? []
+	target.swiftSettings?.append(contentsOf: [
+		.enableUpcomingFeature("InferSendableFromCaptures")
+	])
+}
+#endif

Package@swift-6.0.swift

@@ -0,0 +1,37 @@
+// swift-tools-version:6.0
+
+import PackageDescription
+
+let package = Package(
+	name: "swift-capture",
+	products: [
+		.library(
+			name: "Capture",
+			targets: ["Capture"]
+		)
+	],
+	dependencies: [
+		.package(
+			url: "https://github.com/apple/swift-docc-plugin.git",
+			from: "1.4.0"
+		),
+	],
+	targets: [
+		.target(name: "Capture"),
+		.testTarget(
+			name: "CaptureTests",
+			dependencies: [
+				.target(name: "Capture")
+			]
+		),
+	],
+	swiftLanguageModes: [.v6]
+)
+
+for target in package.targets where target.type == .system || target.type == .test {
+	target.swiftSettings?.append(contentsOf: [
+		.swiftLanguageMode(.v5),
+		.enableExperimentalFeature("StrictConcurrency"),
+		.enableUpcomingFeature("InferSendableFromCaptures"),
+	])
+}

README.md

@@ -1,6 +1,6 @@
 # swift-capture
 
-[![test](https://github.com/CaptureContext/swift-capture/actions/workflows/Test.yml/badge.svg)](https://github.com/CaptureContext/swift-capture/actions/workflows/Test.yml) [![SwiftPM 5.9](https://img.shields.io/badge/📦_swiftpm-5.9-ED523F.svg?style=flat)](https://github.com/CaptureContext/swift-declarative-configuration/actions/workflows/Test.yml) ![Platforms](https://img.shields.io/badge/platforms-iOS_|_macOS_|_tvOS_|_watchOS_|_Catalyst-ED523F.svg?style=flat)
+[![test](https://github.com/CaptureContext/swift-capture/actions/workflows/Test.yml/badge.svg)](https://github.com/CaptureContext/swift-capture/actions/workflows/Test.yml) ![SwiftPM 5.9](https://img.shields.io/badge/📦_swiftpm-5.9_|_6.0-ED523F.svg?style=flat) ![Platforms](https://img.shields.io/badge/platforms-iOS_|_macOS_|_tvOS_|_watchOS_|_Catalyst-ED523F.svg?style=flat)
 [![docs](https://img.shields.io/badge/docs-spi-ED523F.svg?style=flat)]([https://twitter.com/capture_context](https://swiftpackageindex.com/CaptureContext/swift-capture/3.0.1/documentation)) [![@capture_context](https://img.shields.io/badge/contact-@capture__context-1DA1F2.svg?style=flat&logo=twitter)](https://twitter.com/capture_context) 
 
 A mechanism for ergonomic and safe capturing & weakifying objects in Swift.
@@ -47,7 +47,7 @@ capture { _self, a, b, c in
 }
 ```
 
----
+----
 
 Methods
 
@@ -77,6 +77,13 @@ let object.dataSource = { [weak self] in
 let object.dataSource = capture(orReturn: [], in: \.data)
 ```
 
+----
+
+Sendable closures (_beta_)
+
+>  Prefix `capture` methods with an underscore to use explicit sendable closures
+>  Tho closures should implicitly infer sendable conformance (see [Package.swift](./Package.swift#L34))
+
 ## Installation
 
 ### Basic
@@ -94,7 +101,7 @@ If you use SwiftPM for your project, you can add `weak` to your package file. Al
 ```swift
 .package(
   url: "[email protected]:capturecontext/swift-capture.git",
-  .upToNextMajor("3.0.0")
+  .upToNextMajor("4.0.0-beta")
 )
 ```
 

Sources/Capture/Capture.swift

@@ -5,69 +5,128 @@ import Foundation
 /// Weakly captures an object in non-parametrized void result closure.
 @inlinable
 public func capture<Object: AnyObject>(
-  _ object: Object,
-  in closure: @escaping (Object) -> Void
+	_ object: Object,
+	in closure: @escaping (Object) -> Void
 ) -> () -> Void {
-  return Weak(object).capture(in: closure)
+	return Weak(object).capture(in: closure)
 }
 
 /// Weakly captures an object in non-parametrized lazy void result closure.
 @inlinable
 public func capture<Object: AnyObject>(
-  _ object: Object,
-  in closure: @escaping (Object) -> () -> Void
+	_ object: Object,
+	in closure: @escaping (Object) -> () -> Void
 ) -> () -> Void {
-  Weak(object).capture(in: closure)
+	Weak(object).capture(in: closure)
 }
 
 /// Weakly captures an object in parametrized void result closure.
 public func capture<Object: AnyObject, each Arg>(
-  _ object: Object,
-  in closure: @escaping (Object, repeat each Arg) -> Void
+	_ object: Object,
+	in closure: @escaping (Object, repeat each Arg) -> Void
 ) -> (repeat each Arg) -> Void {
-  Weak(object).capture(in: closure)
+	Weak(object).capture(in: closure)
+}
+
+// MARK: Sendable
+
+/// Weakly captures an object in non-parametrized void result closure.
+@inlinable
+public func capture<Object: AnyObject & Sendable>(
+	_ object: Object,
+	in closure: @escaping @Sendable (Object) -> Void
+) -> @Sendable () -> Void {
+	return Weak(object)._capture(in: closure)
+}
+
+/// Weakly captures an object in non-parametrized lazy void result closure.
+@inlinable
+public func capture<Object: AnyObject & Sendable>(
+	_ object: Object,
+	in closure: @escaping @Sendable (Object) -> () -> Void
+) -> @Sendable () -> Void {
+	Weak(object)._capture(in: closure)
+}
+
+/// Weakly captures an object in parametrized void result closure.
+public func _capture<Object: AnyObject & Sendable, each Arg>(
+	_ object: Object,
+	in closure: @escaping @Sendable (Object, repeat each Arg) -> Void
+) -> @Sendable (repeat each Arg) -> Void {
+	Weak(object)._capture(in: closure)
 }
 
 // MARK: - Non-void result closures
 
 /// Weakly captures an object in non-parametrized non-void result closure.
 @inlinable
 public func capture<Object: AnyObject, Output>(
-  _ object: Object,
-  orReturn defaultValue: @escaping @autoclosure () -> Output,
-  in closure: @escaping (Object) -> Output
+	_ object: Object,
+	orReturn defaultValue: @escaping @autoclosure () -> Output,
+	in closure: @escaping (Object) -> Output
 ) -> () -> Output {
-  Weak(object).capture(orReturn: defaultValue(), in: closure)
+	Weak(object).capture(orReturn: defaultValue(), in: closure)
 }
 
 /// Weakly captures an object in non-parametrized lazy non-void result closure.
 @inlinable
 public func capture<Object: AnyObject, Output>(
-  _ object: Object,
-  orReturn defaultValue: @escaping @autoclosure () -> Output,
-  in closure: @escaping (Object) -> () -> Output
+	_ object: Object,
+	orReturn defaultValue: @escaping @autoclosure () -> Output,
+	in closure: @escaping (Object) -> () -> Output
 ) -> () -> Output {
-  Weak(object).capture(orReturn: defaultValue(), in: closure)
+	Weak(object).capture(orReturn: defaultValue(), in: closure)
 }
 
 /// Weakly captures an object in parametrized non-void result closure.
 public func capture<Object: AnyObject, each Arg, Output>(
-  _ object: Object,
-  orReturn defaultValue: @escaping @autoclosure () -> Output,
-  in closure: @escaping (Object, repeat each Arg) -> Output
+	_ object: Object,
+	orReturn defaultValue: @escaping @autoclosure () -> Output,
+	in closure: @escaping (Object, repeat each Arg) -> Output
 ) -> (repeat each Arg) -> Output {
-  Weak(object).capture(orReturn: defaultValue(), in: closure)
+	Weak(object).capture(orReturn: defaultValue(), in: closure)
+}
+
+// MARK: Sendable
+
+/// Weakly captures an object in non-parametrized non-void result closure.
+@inlinable
+public func _capture<Object: AnyObject & Sendable, Output>(
+	_ object: Object,
+	orReturn defaultValue: @escaping @autoclosure () -> Output,
+	in closure: @escaping (Object) -> Output
+) -> () -> Output {
+	Weak(object).capture(orReturn: defaultValue(), in: closure)
+}
+
+/// Weakly captures an object in non-parametrized lazy non-void result closure.
+@inlinable
+public func _capture<Object: AnyObject & Sendable, Output>(
+	_ object: Object,
+	orReturn defaultValue: @escaping @autoclosure () -> Output,
+	in closure: @escaping (Object) -> () -> Output
+) -> () -> Output {
+	Weak(object).capture(orReturn: defaultValue(), in: closure)
+}
+
+/// Weakly captures an object in parametrized non-void result closure.
+public func _capture<Object: AnyObject & Sendable, each Arg, Output>(
+	_ object: Object,
+	orReturn defaultValue: @escaping @autoclosure @Sendable () -> Output,
+	in closure: @escaping @Sendable (Object, repeat each Arg) -> Output
+) -> @Sendable (repeat each Arg) -> Output {
+	Weak(object)._capture(orReturn: defaultValue(), in: closure)
 }
 
 // MARK: - Non-void optional result closures
 
 /// Weakly captures an object in non-parametrized non-void optional result closure.
 @inlinable
 public func capture<Object: AnyObject, Output>(
-  _ object: Object,
-  in closure: @escaping (Object) -> Output?
+	_ object: Object,
+	in closure: @escaping (Object) -> Output?
 ) -> () -> Output? {
-  Weak(object).capture(in: closure)
+	Weak(object).capture(in: closure)
 }
 
 /// Weakly captures an object in non-parametrized lazy non-void optional result closure.
@@ -81,8 +140,37 @@ public func capture<Object: AnyObject, Output>(
 
 /// Weakly captures an object in parametrized non-void optional result closure.
 public func capture<Object: AnyObject, each Arg, Output>(
-  _ object: Object,
-  in closure: @escaping (Object, repeat each Arg) -> Output?
+	_ object: Object,
+	in closure: @escaping (Object, repeat each Arg) -> Output?
 ) -> (repeat each Arg) -> Output? {
-  Weak(object).capture(in: closure)
+	Weak(object).capture(in: closure)
 }
+
+// MARK: Sendable
+
+/// Weakly captures an object in non-parametrized non-void optional result closure.
+@inlinable
+public func _capture<Object: AnyObject & Sendable, Output>(
+	_ object: Object,
+	in closure: @escaping @Sendable (Object) -> Output?
+) -> @Sendable () -> Output? {
+	Weak(object)._capture(in: closure)
+}
+
+/// Weakly captures an object in non-parametrized lazy non-void optional result closure.
+@inlinable
+public func _capture<Object: AnyObject & Sendable, Output>(
+	_ object: Object,
+	in closure: @escaping @Sendable (Object) -> () -> Output?
+) -> @Sendable () -> Output? {
+	Weak(object)._capture(in: closure)
+}
+
+/// Weakly captures an object in parametrized non-void optional result closure.
+public func _capture<Object: AnyObject & Sendable, each Arg, Output>(
+	_ object: Object,
+	in closure: @escaping @Sendable (Object, repeat each Arg) -> Output?
+) -> @Sendable (repeat each Arg) -> Output? {
+	Weak(object)._capture(in: closure)
+}
+